Machine for grinding paper-pulp



(No Model.)

J. B. SHEPLBR.

MACHINE FOR GRINDING PAPER PULP;

Patented Mar. 4, 1884.

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JOHN B. SHEPLER, :OF TOLEDO, OIIIO.

MACHINE FOR GRINDING PAPER-PULP.

SPECIFICATION forming part of Letters Patent No. 294,689, dated March 4, 1884:,

Application filed April 16, 1883. (No model.)

To aZZ whom, it may concern-.-

Be it known that I, J OHN B. SHEPLER, a cit1zen,of the United States, residing at T0- ledo, Lucas county, Ohio, have invented certain new and useful Improvements in Machines for the lIIanufacture of Paper-Pulp, of which the following is a specification.

My invention relates to improvements in that class of machines for reducing straw and Other material to pulp in the manufacture of p'aper'and boards in which the stock, in the process of grinding, passes between two plates with suitable grinding-surfaces, one of said plates being fixed and the other revolving. In machines of this class heretofore in use the circular case or drum containing the grinding-plates has consisted of a hoop at its circumference, provided with flanges, to which have been bolted plates, constituting the ends of the drum, the inner side of one of said plates serving as the fixed gri dingsurface of grinding-plate by means of a set-screw at-,

tached to the other fixed plate of the drum, which screw is set against the end of the shaft carrying the revolving plate. This method is objectionable, as imposing an undue strain upon the plates of the drum, causing frequent breakages.

The object of my invention is to obviate the objections above indicated. I attain this object by means of the mechanism hereinafter described, and illustrated in the accompany-.

ing drawings, constituting part hereof, in which f Figure 1 is a central longitudinal vertical section of my device; Fig. 2, a plan, and Fig. 3 an end elevation, of the same.

Si milar letters refer to similar parts through out the several views.

The drum or cylinder containing the circular grinding-plates B and 0 consists of hoop A, back plate, a, flange a, and plate It, bolted to flange a.

D is a shaft, to which are attached revolving plate Oand fingers or knockers c 0, revolving within a cylinder, 6, (which forms a shoulder for plate 66,) from the inner surface of which project fingers c, and which cylinder opens into hopper II.

My invention consists, in part, in forming this last-mentioned cylinder e,-back plate, a, hoop A, and flange a of one piece, in order to give greater strength and weight to this part of the machine. The surfaces of back plate, a, and of stationary grinding-plate B, which are in contact, are planed or ground perfectly smooth and flat, and plate B is bolted rigidly to back plate, a, the adjustment, being once made, remaining until plate Bis worn out, ob-

viating the necessity for frequent adjustment. This arrangement not only strengthens the drum, but adds strength to plate B and renders it less liable to crack, and facilitates the removal and renewal of worn-out grindingplates. 1

My machine is provided with a heavy bed plate or frame, E, to which the drum is securely bolted. Shaft D passes through stuffing-box s, and is provided with pulley 4. At each end of shaft D, passing through bedplate E, or pieces attached thereto, are adjusting-screws f f, by means of which shaft D is moved longitudinally, carrying with it plate O, so as to adjust and set the revolving plate at any required distance from fixed plate 13. By this arrangement the strain of the adjusting-screws, instead of being upon the plate of the drum, as in pulp-machines in use, is upon the bed-plate of the machine.

I am aware that burr-stones have been adjusted in the manner described, and I do not claim, broadly, the adjustment of a grindingdisk by means of screws placed at either end of its shaft; but

What I claim as new, and desire to secure by Letters Patent, is

the combination of the bed plate or frame,

1. In a machine for reducing paper-pulp, the combination of the bed plate or frame 1 hopper H, eylinder 0, having fingers 6, back plate a, hoop A, having flange a, plate 1', and grinding plate B, secured to the back plate, in combination with the shaft I), mounted in the bed-plate, and provided at each end with adjusting screws 1', a grinding plate, 0, mounted 011 the shaft, pulleyd, stuffing-box a, and lingers e, as set forth.

2. In a machine for reducing paper-pulp,

' hopper II, cylinder 0, back plate, (I, provided with the grinding-plate B, secured thereto, the front plate, 'i, and hoop A, with the shalt I5 1), mounted in the bed-plate, and having adjusting-screws], a grimling- 'llate, G, mounted on the shaft, and means for operating the same,

as setforth.

JOHN B. SHEPLE'R.

\Vil nesses:

ll. E. KING, Fawn B. Swtn'xn, 

